Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Expected Benefit Payments And Medicare Subsidy Receipts For Next Five Years And Thereafter) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Prescription Drug Subsidy Receipts, Fiscal Year Maturity [Abstract]
Medicare subsidy receipts in 2013	$ 1,380
Medicare subsidy receipts in 2014	0
Medicare subsidy receipts in 2015	0
Medicare subsidy receipts in 2016	0
Medicare subsidy receipts in 2017	0
Medicare subsidy receipts in 2018-2022	0
Pension Plan Assets [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected benefit payments in 2013	70,191
Expected benefit payments in 2014	71,110
Expected benefit payments in 2015	72,624
Expected benefit payments in 2016	74,515
Expected benefit payments in 2017	77,117
Expected benefit payments in 2018-2022	454,102
SERPA Benefits [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected benefit payments in 2013	1,148
Expected benefit payments in 2014	4,064
Expected benefit payments in 2015	1,872
Expected benefit payments in 2016	1,793
Expected benefit payments in 2017	2,432
Expected benefit payments in 2018-2022	16,577
Postretirement Healthcare Benefits [Member]
Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]
Expected benefit payments in 2013	30,123
Expected benefit payments in 2014	28,455
Expected benefit payments in 2015	28,035
Expected benefit payments in 2016	26,964
Expected benefit payments in 2017	26,009
Expected benefit payments in 2018-2022	$ 128,686

Employee Benefit Plans And Other Postretirement Benefits (Schedule Of Expected Benefit Payments And Medicare Subsidy Receipts For Next Five Years And Thereafter) (Details) (USD $)
In Thousands, unless otherwise specified

Dec. 31, 2014

Prescription Drug Subsidy Receipts, Fiscal Year Maturity [Abstract]

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Medicare subsidy receipts in 2014

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Medicare subsidy receipts in 2015

0us-gaap_PrescriptionDrugSubsidyReceiptsYearThree1

Medicare subsidy receipts in 2016

0us-gaap_PrescriptionDrugSubsidyReceiptsYearFour1

Medicare subsidy receipts in 2017

0us-gaap_PrescriptionDrugSubsidyReceiptsYearFive1

Medicare subsidy receipts in 2018-2022

0us-gaap_PrescriptionDrugSubsidyReceiptsAfterYearFive

Pension Plan Assets [Member]

Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]

Expected benefit payments in 2013

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Expected benefit payments in 2014

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Expected benefit payments in 2015

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Expected benefit payments in 2016

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Expected benefit payments in 2017

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Expected benefit payments in 2018-2022

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SERPA Benefits [Member]

Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]

Expected benefit payments in 2013

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Expected benefit payments in 2014

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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
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Expected benefit payments in 2015

1,872us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember

Expected benefit payments in 2016

1,793us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember

Expected benefit payments in 2017

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/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember

Expected benefit payments in 2018-2022

16,577us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember

Postretirement Healthcare Benefits [Member]

Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract]

Expected benefit payments in 2013

30,123us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember

Expected benefit payments in 2014

28,455us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember

Expected benefit payments in 2015

28,035us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember

Expected benefit payments in 2016

26,964us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember

Expected benefit payments in 2017

26,009us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember

Expected benefit payments in 2018-2022

$ 128,686us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the prescription drug subsidy receipts to be received after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964

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Amount of the prescription drug subsidy receipts to be received in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the prescription drug subsidy receipts to be received in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the prescription drug subsidy receipts to be received in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the prescription drug subsidy receipts to be received in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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